Add zenuml

packages/mermaid-zenuml/src/parser.ts

@@ -0,0 +1,10 @@
+// ZenUML manage parsing internally. It uses Antlr4 to parse the DSL.
+// The parser is defined in https://github.com/ZenUml/vue-sequence/blob/main/src/parser/index.js
+
+// This is a dummy parser that satisfies the mermaid API logic.
+export default {
+  parser: { yy: {} },
+  parse: () => {
+    // no op
+  },
+};